The correct option is D 14
The day on which the whole disc of
the moon is visible is known as the full
moon day. Thereafter, every night the size of the bright part of the moon
appears to become thinner and thinner.
On the fifteenth day, the moon is not
visible. This day is known as the new
moon day. The next day, only a small
portion of the moon appears in the sky.
This is known as the crescent moon.
Then again the moon grows larger every
day. On the fifteenth day once again we
get a full view of the moon.