In this verbal analogy question, select the related word from the given alternatives to complete the pair: Yellow : Lemon :: Purple : ?

Introduction / Context:
This is a colour based verbal analogy. The pair Yellow and Lemon is given, and you must select the word that stands to Purple in the same way. These questions draw on common visual associations between colours and familiar objects, such as fruits or vegetables, and are frequently used in basic reasoning tests to check everyday knowledge and observation skills.

Given Data / Assumptions:
The first pair is Yellow and Lemon.
The second pair is Purple and an unknown word from the options.
The options are Apple, Brinjal, Mango, Onion, and Banana.
We assume that Lemon is an object that is typically Yellow and that we need to find an object that is typically Purple.

Concept / Approach:
In the first pair, Yellow : Lemon, the relationship is colour to object that is commonly recognised by that colour. Lemons are widely known as yellow fruits. To preserve the structure, we must find an object among the options that is normally associated with the colour Purple. In everyday life, a very common example is Brinjal, also known as eggplant, which usually has a deep purple skin. Therefore, Purple should correspond to Brinjal.

Step-by-Step Solution:
Step 1: Interpret the first pair as colour to common object. Yellow is the colour, and Lemon is a fruit that is generally Yellow.Step 2: Apply the same relationship to the second pair. Purple is the colour, and we must choose a common object that is usually Purple.Step 3: Among the options, Brinjal is a vegetable that is characteristically Purple in appearance.Step 4: Therefore, Purple should be paired with Brinjal, just as Yellow is paired with Lemon.Step 5: Confirm that no other option has such a strong and typical association with the colour Purple.

Verification / Alternative check:
We can check each option against the colour Purple. Apples are most commonly red, green, or sometimes yellow, not Purple. Mangoes are usually green or yellow when ripe. Onions come in various types, but the most basic association in simple questions is often with white or light colours. Bananas are typically yellow. In contrast, Brinjal is almost universally visualised as a Purple vegetable in basic science and general knowledge. This confirms that Brinjal is the only choice that fits the colour object pattern, just as Lemon fits Yellow.

Why Other Options Are Wrong:
Option Apple does not have a standard Purple form in basic general knowledge; its common colours are red and green.
Option Mango is associated more with green and yellow shades rather than Purple.
Option Onion can have a reddish or purplish outer layer in some varieties, but exam questions at this level usually expect the direct and primary Purple association with Brinjal, not a less obvious association.
Option Banana is almost always thought of as Yellow, which would repeat the colour used in the first pair rather than complement Purple in the second.

Common Pitfalls:
Some candidates may overthink and consider rare varieties of fruits and vegetables with unusual colours, but reasoning questions like this aim at the most common and widely taught associations. Another mistake is to look only for any food item without checking the colour link carefully. A systematic approach is to identify the nature of the relationship, in this case colour to object, and then choose the option that best reflects the most common real world pairing with the second colour.

Final Answer:
Thus, in the analogy Yellow : Lemon :: Purple : ?, the correctly related word is Brinjal.