@Susheelkumar Note: I must let you know that HP does not recommend upgrades or hardware changes as the device is equipped with parts that perform at its optimal performance by design, that said, the upgradeable parts listed by HP articles are purely for your ease, as the decision to upgrade will be at your own discretion.
That out of the way, here's a list of parts tested and approved by HP to work on your device:
Memory module type: (PC3, 12800, 1600-MHz) - Universal part number
4-GB - 652972-001
2-GB - 641369-001
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