The correct option is B 4
A term is a constant or a variable or a product or a quotient of constant and variables.
An algebraic expression is a collection of one or more terms, which are separated from each other by the signs +(plus) and/or - (minus).
In the expression :11xy+6ay−4z+25
the terms are :11xy ; 6ay ; 4z and 25.
Hence the total number of terms = 4