\int_{\alpha}^{\beta} \varphi(x) d x+\int_{\beta}^{\alpha} \varphi(x) d x= (a) 1 (b) 2 \int_{\alpha}^{\beta} \varphi(x) d x (c) -2 \int_{\beta}^{\alpha} \varphi(x) d x (d) 0
\int_{\alpha}^{\beta} \varphi(x) d x+\int_{\beta}^{\alpha} \varphi(x) d x= (a) 1 (b) 2 \int_{\alpha}^{\beta} \varphi(x) d x (c) -2 \int_{\beta}^{\alpha} \varphi(x) d x (d) 0

SOL:
Correct option is D. 0