Statement: "Let there be a signboard also indicating the directions and instructions." On this basis, which of the following assumptions are implicit? a) A signboard can be prepared without using any language. b) A signboard is the only effective tool to indicate directions.

Introduction / Context:
This statement and assumption question is about the use of a signboard to indicate directions and instructions. The speaker suggests that there should also be a signboard. We are given two possible assumptions about signboards and must decide whether any of them are actually implied by the statement. Many assumption questions check whether we can distinguish between what is merely possible and what is strictly required for the statement to be reasonable.

Given Data / Assumptions:

• Statement: Let there be a signboard also indicating the directions and instructions.
• Assumption a: A signboard can be prepared without using any language.
• Assumption b: A signboard is the only effective tool to indicate directions.
• The context suggests that signboards are one of the tools for guiding people.

Concept / Approach:
The statement simply proposes adding a signboard as an additional method of giving directions and instructions. It does not say anything about how the signboard will be prepared, whether it must avoid language, or whether it is the only tool that can be effective. Many signboards do use written language, arrows, symbols, or a combination. Also, directions can be given verbally, through maps, or using digital displays. Hence neither of the two given assumptions is necessary for the statement. The statement only assumes that a signboard is a useful tool, not that it is language free or uniquely effective.

Step-by-Step Solution:
Step 1: Consider Assumption a. The statement does not suggest that language will not be used; it only says let there be a signboard indicating directions.Step 2: The signboard could use text, arrows, colours, or symbols, so the assumption that it can be prepared without language is not required.Step 3: Consider Assumption b. The statement does not say that signboards are the only effective tool, only that a signboard should also be used.Step 4: Other tools like spoken announcements or digital displays may already be in use, and the signboard is an additional aid.Step 5: Therefore neither assumption a nor assumption b is implicit in the statement.

Verification / Alternative check:
If we deny Assumption a and accept that language will be used, the statement still remains perfectly meaningful.If we deny Assumption b and accept that other tools can also work, the statement still makes sense as it says let there be a signboard also.So the statement does not logically depend on either assumption a or assumption b.

Why Other Options Are Wrong:
Option B is wrong because there is no need to assume the signboard will avoid language.Option C is wrong because suggesting a signboard does not imply that it is the only effective tool.Option D is wrong because both assumptions together are still not required by the statement.

Common Pitfalls:
Learners sometimes read extra technical details into simple suggestions like installing a signboard.Another pitfall is to misinterpret the word also as meaning only, which completely changes the assumption analysis.

Final Answer:
Since neither assumption is necessary, the correct option is Both a and b are not sufficient.