Ammar Belal is the charming young guy behind the stylish ABCD, the label that has injected new life into the stodgy old Sarah’s retail empire. That’s quite an achievement for someone who majored in management, and whose only qualification in fashion is a short stint as an intern at Selfridges in London. But what Ammar lacks in professional training, he makes up for with his natural talent, intelligence, enthusiasm, and inherent love of clothes. These have helped ABCD become one of the most sought-after casualwear labels around. Walk into his …