Six lectures A, B, C, D, E and F , each of one hour duration, scheduled between 8:00 am and 2:00 pm

Consider the following question and two statements:

Question: Which lecture is in the third period?

Statement-1: Lecture F is preceded by A followed by C .

Statement-2: No lecture after lecture B .

Which of the following is correct regarding the question and the statements?

Question

Question

This question was previously asked in

UPSC Civil Services Prelims (CSAT) Official Paper-II (Held On: 5 June 2022)

Answer 1

The correct answer is Option 4.

Key Point:

Given : Statement-1: Lecture F is preceded by A followed by C. Statement-2: No lecture after lecture B .
Case 1 : AFC_ _ B
Case 2 : _AFC_B
Case 3 : _ _ AFCB
It’s pretty evident that neither of the two statements is sufficient alone. So, even by using both the statements we cannot determine the answer.
Even on combining the two, we get multiple possible cases
Hence in Statement 1 there are many possibilities.
There may be even more cases as it’s not necessary that A, F and C are consequent lectures.
Hence Option 4 is correct.