Answer: 0.
- A 0
- B 35
- C 12
- D −35
Correct answer: A. 0
Explanation: Two identical rows make the determinant zero: (7)(5) − (5)(7) = 0.
Concept context
Evaluation of determinants, cofactors, adjoint, inverse of matrix, Cramer's rule and area applications. Always in board and JEE.