Let S₁= _ j=1 ¹⁰ j(j-1) 10_ C_j , S₂= _ j=1 ¹⁰ j 10_ C_j and S₃= _ j=1 ¹⁰ j^2 10_ C_j . Assertion (A) : S ₃=55 2^9 Reason (R) : S ₁=90 2^8 and S ₂=10 2^8

Options

1. ABoth (A) and (R) are true and R is the correct explanation of (A)
2. BBoth (A) and (R) are true, but (R) is not the correct explanation of (A)
3. C(A) is true, but (R) is false
4. D(A) is false, but (R) is true