Kom overcame a spirited Nikhit Zareen, while Sarita Devi passed the Meena Kumari test.
Meanwhile, Mishra emerged winner in a bout which had to be decided on the basis of two rounds after power failure in the NEHU, SAI Special Area Games venue disrupted the game.
Others who made the cut are Sarjubala Devi, Soniya and Pooja Rani.
Earlier, the famed MC Mary Kom was forced to come out of her comfort zone by the versatile Nikhit Zareen, who started on an impressive note.
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The technique of stepping back, waiting for her opponent to make the move that Mary Kom used to perfection in the last two days, was again seen on play and it did work in her favour in the second round.
The third round started on a rather aggressive note with both boxers trading a jab each but by the end of two minutes, Mary managed to gain upper hand over her young rival.
Combining her hooks and jabs, the Asian Games gold medallist tamed her spirited opponent in the fourth round to seal the deal in her favour.
"It is a strong team with proven performers and even
though the competition is going to be immense, I am hopeful of good results," said Sandhu.
Their resolve notwithstanding, an undeniable reality of Indian boxing is the shoddy state of its administration. The country has been without a national federation for almost a year now and an ad-hoc committee appointed by AIBA is running the sport.
"One can't deny that the circumstances are tough but we are doing our job. The biggest setback in all this has been the lack of exposure trips to countries like Cuba. The boxers have suffered on that front," Sandhu said.
"But I am very proud of the way they have handled themselves and we have also got good support from the Sports Authority of India (SAI) in continuing the camp in Patiala," he added.