Question: Which of these pairs has at least student of IIM Ahmedabad?
Explanation:
Since an student of the company is assumed to have appeared for four rounds, the rounds (in sequence are): Common Aptitude Test (CAT), Written Ability Test (WAT), Personal Interview (PI) and IIM Ahmedabad college selection (CS).
If a person does not reach a certain round, he/she has definitely failed in one of the earlier rounds. Similarly, if a person does not clear a round, he has appeared for that round but failed to clear it.
The data that is directly known is given in the table;
Since Jhalak is not an student of the company, she either cleared PI but did not clear CS or she did not clear PI at all.
Since one of Harshita and Jhalak is an student, Harshita cleared all four rounds.
Gautam cleared the PI round. Hence, he definitely cleared the first three rounds.
Adarsh did not clear the PI round. Hence, Adarsh appeared for 3 rounds, in which he cleared CAT and WAT but did not clear PI.
Arpita did not reach the PI round. Hence, she failed in the CAT or WAT round.
Exactly one person did not clear CAT. Hence, this person cleared zero rounds. This person can be Arpita, Muskaan or Vishal.
But Vishal cleared at least one round. Also, Muskaan cleared more rounds than Gautam. Hence, Muskaan cleared all four rounds and Gautam cleared only three rounds.
Hence, Arpita was the person who did not clear the CAT round. Everyone else cleared it.
Five people cleared the WAT round. The four peope shown above and Muskaan definitely cleared the WAT round. Hence, Arpita and Vishal did not clear it.
Hence, the final table is:
Harshita and Muskaan are the only students in IIM Ahmedabad.
Only option (d) i.e. Muskaan - Gautam has one of them.
Hence, option (d).