Arrange the following words in the sequence in which they occur in a standard English dictionary, and then select the correct numeric code: 1. Brides 2. Boastful 3. Blizzard 4. Biology 5. Brilliant.

Introduction / Context:
This question asks you to arrange five words in dictionary order and then select the matching numeric sequence. The words are Brides, Boastful, Blizzard, Biology and Brilliant. All begin with the letter B, so the ordering depends on their subsequent letters. This problem tests your ability to compare words alphabetically beyond the first character and to translate the resulting order into the correct numeric code.

Given Data / Assumptions:

• Words with codes: 1. Brides, 2. Boastful, 3. Blizzard, 4. Biology, 5. Brilliant.
• Standard English alphabetical rules for dictionary ordering are assumed.
• Our task is to determine which of the options correctly reflects the sorted order of these five words.

Concept / Approach:
When arranging words alphabetically, we compare letters from left to right. Because all words start with B, we first compare the second letter, then the third, and so on. We can group words with the same first two letters and then order them internally by later letters. In this question, attention to the second letter is especially important because it splits the list into several groups: 'bi', 'bl', 'bo' and 'br'.

Step-by-Step Solution:
Step 1: Write the words with their first two letters highlighted: Brides (Br...), Boastful (Bo...), Blizzard (Bl...), Biology (Bi...), Brilliant (Br...). Step 2: Compare the second letters: r (Brides), o (Boastful), l (Blizzard), i (Biology), r (Brilliant). In alphabetical order, i comes first, then l, then o, then r. Step 3: Therefore, the first word in dictionary order must be Biology (4), since 'bi' is the earliest combination. Step 4: Next comes Blizzard (3) with 'bl', because 'l' follows 'i'. Step 5: After that comes Boastful (2) with 'bo', since 'o' follows 'l' and precedes 'r'. Step 6: Now consider the two words starting with 'br': Brides (1) and Brilliant (5). After 'br', Brides has 'i' (brid...), while Brilliant has 'i' as well (bril...), so we continue comparing. The next letters give 'd' in Brides and 'l' in Brilliant. Since 'd' comes before 'l', Brides (1) comes before Brilliant (5). Step 7: Combining the results, the dictionary order is Biology (4), Blizzard (3), Boastful (2), Brides (1), Brilliant (5), giving the numeric code 43215.

Verification / Alternative check:
To verify, you can list the words in the proposed 43215 order and check each adjacent pair. Biology precedes Blizzard because 'bi' comes before 'bl'. Blizzard precedes Boastful because 'bl' comes before 'bo'. Boastful precedes Brides because 'bo' comes before 'br'. Finally, Brides precedes Brilliant because 'brid' sorts before 'bril'. Since all these comparisons are consistent with alphabetical rules, the sequence 4, 3, 2, 1, 5 is confirmed as correct.

Why Other Options Are Wrong:
Option 15234 suggests that Brides comes before Biology, which is wrong because 'bi' clearly precedes 'br'. Option 54321 reverses the order in a way that contradicts the alphabetical ranking of the second letters. Option 32145 starts with Blizzard, ignoring that Biology with 'bi' should come first. Option 32145 and others also misplace Boastful relative to the 'br' words. Since none of these alternative codes respects all pairwise comparisons correctly, they cannot be correct.

Common Pitfalls:
A common error is to focus on word familiarity or length rather than on strict alphabetical comparison, for example assuming Brides or Brilliant must come first because they seem more common. Another pitfall is to pay attention only to the first two letters and then guess, instead of continuing the comparison when the first letters match. To avoid mistakes, always compare characters step by step until any difference appears, and then translate the resulting order carefully into the numeric code.

Final Answer:
In proper dictionary order, the words appear as Biology, Blizzard, Boastful, Brides and Brilliant, corresponding to the numeric sequence 43215. Therefore 43215 is the correct answer.