Hi Mani,
On 120 marks in TSICET 2019, your rank will be somehwere around 700-1000. Yes, you can get a seat in JNTUH. As per last year, the cutoff for JNTU OC boys was around 2710 rank, according to which there has high chances of you obtaining a seat in JNTUH. For full cutoffs of JNTU as well as other institutes check this link:
https://images.careers360.mobi/sites/default/files/ts-icet-cutoff.pdf
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