The IQ of 7 boys B1, B2, B3, B4, B5, B6 and B7 is tested and the values are compared.
B2 has a higher IQ than B6. B5 has the third lowest IQ. B4 has a higher IQ than 6 boys.
B3 has an IQ less than B2. B1 has a higher IQ than B2. B7 has the least IQ.
Who has the second highest IQ?

A

B2

B

B7

C

B1

D

B3