While Army Boys, Bihar outplayed NCC (West Bengal & Sikkim) 1-0 thanks to a first-half strike by Saroj Rai, Meghalaya went through courtesy a couple of late goals by Mebanshan Suting.
Army Boys, Bihar and Meghalaya will face each other in the semifinals on October 12.
The match between Army Boys & NCC was a one-sided affair with the former enjoying the upper hand. NCC played better in the second half and did create a few chances but were let down by poor finishing. They almost equalised 10 minutes from the end but Bijoy Jirel hit the upright from close range.
Meghalaya clinched the issue late in the second half as Suting took advantage of a tiring Jharkhand defence.
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"It was a tough match since their players are extremely fit and they have a very strong defence," Meghalaya coach said after the match. "I am happy, but also relieved. We have beaten a very strong team today."
In the girls' section, skipper Dorothi hogged the limelight with four goals as Burguri High School, Assam thrashed Dona Paula HS of Goa 5-0.
Ahlcon Public School of Delhi survived some torrid times in the second period to hold a much superior IPSC girls to a goal less draw.