1. Seven books are placed one above the other in a particualr way.
  2. History book is placed exactly above Civics book.
  3. Geography book is fourth from the bottom and English book is fifth from the top.
  4. There are two books in between Civics and Economics books.
How many books are there between Civics and Science books ?
To answer this question, which other extra information is required, if any, from the following ?

C. THERE IS ONE BOOK BETWEEN ENGLISH AND SCIENCE BOOKS.

Seven friends Kamal, Manish, Rohit, Amit, Gaurav, Pritam and Priya are sitting in a circle. Kamal, Manish, Rohit, AMit, Pritam and Priya are sitting at equal distances from each other.
Rohit is sitting two places right of Pritam, who is sitting one place right of Amit. Kamal forms an angle of 90 degrees from Gaurav and an angle of 120 degrees from Manish. Manish is just opposite Priya and is sitting on the left of Gaurav. The angle between Gaurav and Manish in the clockwise direction is 

D. NONE OF THESE

(A). There are five friends.
(B). They are standing in a row facing South.
(C). Jayesh is to the immediate right of Alok.
(D). Pramod is between Bhagat and Subodh.
(E). Subodh is between Jayesh and Pramod. To find answer to the above two questions, which of the given statements can be dispensed with ?

B. A ONLY

(A). There are five friends.
(B). They are standing in a row facing South.
(C). Jayesh is to the immediate right of Alok.
(D). Pramod is between Bhagat and Subodh.
(E). Subodh is between Jayesh and Pramod. Who is at the extreme left end ?

A. ALOK

Six friends A, B, C, D, E and F are sitting in a closed circle facing the centre. A is facing D. C is between A and B. F is between E and A. Who is to the immediate left of B ?

B. C