For what value of â€œkâ€ will the equation (2kx2 + 7kx +2)=0 have equal roots?  Select the correct option.
A) 2 / 7
B) 16 / 49
C) 16 / 25
D) 7 / 1
E) 7 / 2

Rationale: "for a 2 nd degree equation ax 2 + bx _ c = 0 has equal roots the condition is b 2 - 4 ac = 0 in the given equation ( 7 k ) ^ 2 - 4 * 2 k * 2 = 0 by solving this equation we get k = 0 , k = 16 / 49 answer : b"
Answer: B