Non-performing Assets $\text{(NPAs)}$ of a bank in India is defined as an asset, which remains unpaid by a borrower for a certain period of time in terms of interest, principal, or both.Reserve Bank of India $\text{(RBI)}$ has changed the definition of $\text{NPA}$ thrice during $1993-2004$,in terms of the holding period of loans. The holding period was reduced by one quartereach time. In $1993$, the holding period was four quarters $\text{(360 days)}$.
Based on the above paragraph, the holding period of loans in $\text{2004}$ after the third revision was ______ days.
1. $45$
2. $90$
3. $135$
4. $180$