If the equation 4x^2+hxy+y^2=0 represent...

If the equation `4x^2+hxy+y^2=0` represent coincident lines, then h is equal to

A

(a) `+-2`

B

(b) `+-4`

C

(c) `+-1`

D

(d) `0`

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The correct Answer is:

B

NA

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