Question

Colour of night blooming flowers is usually
a. violet
b. red
c. yellow
d. whitish.

Answer 1

$\underline\bold\pink{\huge{Your\:answer}}$

HELLO MATE
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THE COLOUR OF NIGHT BLOOMING FLOWER IS USUALLY WHITISH
THE WHITE COLOUR OF FLOWER IS BECAUSE IT BLOOMS AT NIGHT SO, NOT A LARGE AMOUNT OF ENERGY IS REQUIRED TO PRODUCE THE COLOURED PETALS

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Answer 2

D.Whitish  is your answer, As they boom in night the plants therefore doesn't have to waste their resources producing colored pigments. To attract night pollinators they are generally pollinated by moths and bats however , night blooming flowers are generally  scented in order to attract pollinators at night time. Hence they are generally white. Thank you...,