Consider the following statements:
a) A Mesolithic period rock painting depicting a person tilling a piece of land has been found in Tamil Nadu.
b)
D. Kanna Babu, former Superintending Archaeologist of the Temple Survey Project (Southern Region) found the Painting.
c) It was identified while surveying the lower River Krishna Valley to ascertain the architectural features of shrines. Which of the following statements is/are incorrect?

A Mesolithic period rock painting depicting a person tilling a piece of land has been found by D. Kanna Babu, former Superintending Archaeologist of the Temple Survey Project (Southern Region) of the Archaeological Survey of India, Chennai, in Orvakallu village in Guntur district, Andhra Pradesh. The new prehistoric rock paintings on the walls and ceiling of natural rock shelters on a hillock at Orvakallu were identified while surveying the lower River Krishna Valley to ascertain the architectural features of shrines.