Based on standard logic gate symbols from the AIPMT 2011 question:

1. The AND gate has a straight input edge and a curved D-shaped output edge (figure ii).
2. The NAND gate is depicted as an AND gate with a small circle (inversion bubble) at the output (figure iv).
3. The NOT gate is represented by a triangle with a small circle at the apex (figure iii). Therefore, the correct sequence representing AND, NAND, and NOT gates is (ii), (iv), and (iii).