Marginal Revenue Can Be Defined in Terms of Price (P)and $\eta$

Multiple Choice

Marginal revenue can be defined in terms of price (P) and elasticity (ç) as:

A) MR = P( $\eta$ + 1/ $\eta$ ) .
B) P = MR(1/ $\eta$ ) .
C) MR = P $\eta$ .
D) MR = P(1 + 1/ $\eta$ ) .
E) P = MR(1 - 1/ $\eta$ ) .