(a) Tansen was the title given to him by Emperor Akbar.
Tansen invented the night raga Darbari Kanhra, morning raga Mian Ki Todi, mid-day raga, Mian ki Sarang, seasonal raga Mian ki Malhar.
So, d is right, therefore eliminated, because we've to find wrong statement.
He composed many dhrupads on Ganesha, Shiva, Parvati and Rama. He also composed songs on his patrons.
So, b and c also eliminated.
Tansen was the title given to him by Raja Vikramjit of Gwalior.
So, a is wrong, and therefore it's the answer.