How to solve

$4$ Last year, Caroline earned $$45,000.$ In August of this year, Caroline contributed $$6,410$ to an RRSP$.$ Assuming she does not have an RRSP carryforward and she incurred a pension adjustment of $$3,690,$ what is the MAXIMUM amount Caroline can deduct as an RRSP contribution on her tax return for this year?

$$0$

$$4,410$

$$6,410$

$$8,100$