(a) As a result of dispersion produced by the prism, the white light is split up into seven colours. These colours as we know are represented by the letters of the word 'VIBGYOR'. Thus, the position blue in the 3rd position and yellow in the 7th position. These are the colours of the sky and the gold metal respectively .'Thus, the statement is correct.
(b) The positions of the colours of the given objects are represented by:
(f) Brinjal - 7
(it) Danger signal - 1
(Hi) Neel - 6
(iv) Orange - 2