The Total solution for NCERT class 6-12
(a)(2,4)∈R(b)(3,8)∈R(c)(6,8)∈R(d)(8,7)∈R
Option (c) satisfies the condition that a = b – 2i. e. 6 = 8 – 2 and b > 6, i.e. b = 8=> option (c) is correct.