The sequence is: Seema, Renu, Deepa, Monal. Clearly, Deepa is sitting second from the left in the photograph. Hence, option (C) is the correct answer.

The order is Dinesh, Babita, Amit, Eshaan, Chitra. Clearly, Amit is in the middle. Hence, option (A) is the correct answer.

The order is: Nilesh, Omveer, Prakash, Qureshi, Rahim, Sam, Tina. Clearly, Qureshi is in the middle. Hence, option (D) is the correct answer.

The order is: Renu, Kamal, Preet, Sumit, Tania. Clearly, Preet and Tania are sittiing adjacent to Sumit. Hence, option (C) is the correct answer.

The order is : Nitin, Ravi, Manish, Saurabh , Ashok. Clearly, Nitin is adjacent to Ravi. Hence, option (A) is the correct answer.

The arrangement is shown in the following image :
Clealry we can see that Dinu is to the left of Beena. and Ajay is to the right of Chitra. Hence, option (C) is the correct answer.

The original seating arrangement is as follows:
Deepu   Bobby   Fatima
Arti     Ehan    Chinu

After interchanging the position with Ehan, the new sitting arrangement will be as shown:
Ehan   Bobby   Fatima
Arti    Deepu   Chinu

Clearly, we can see that new neighbours of Deepu will be Arti and Chinu. Hence, option (D) is the correct answer.

The seating arrangement is shown as follows:

Clearly, we can see that Chi is to the immediate left of Brit. Hence, option (B) is the correct answer.

The seating arrangement is shown as follows:

Clearly, we can see that Cham is facing Dhir. Hence, option (A) is the correct answer.

The seating arrangement is shown as follows:
H  G  C
B   E
F D A

Clearly, we can see that H is diagonally opposite to A. Hence, option (C) is the correct answer.