The leaves of an expression tree always contain?

Category: QuestionsThe leaves of an expression tree always contain?
Editor">Editor Staff asked 4 weeks ago

The leaves of an expression tree always contain?
 
(a) operators
 
(b) operands
 
(c) null
 
(d) expression
 
My doubt stems from Trees topic in division Trees of Data Structures & Algorithms I
 
This question was posed to me in exam.