Answer : 4. "Tata Electronics"
Explanation :

Solution: Taiwan-based Wistron announced that its board has approved the sale of its Indian unit, Wistron Infocom Manufacturing, to the Tata Group. Wistron assembles Apple Inc's iPhone devices and components for these smartphones in Bengaluru and Hosur. Tata Electronics is set to buy the Wistron subsidiary for $125 million, after which it will formally take over the operations.