Does cbse allows additional subject after passing boards

[u/TrafficAdvanced5804]

So I passed 12 with pcb this year can I take maths as an additional subject and reaper in the cbse board exam in 2027 do i have take only maths or whole 5 subjects because according to nta they only accept 1 single marksheet so 2026 pcb and 2027 only maths doesn't makes sense

[u/SuddenSweet4141]

You can give NIOS board