Odsville has five firms - Alfloo, Bzygoo, Czechy, Drjbna and Elavalaki. Each of these firms was founded in some year and also closed down a few years later.
Each firm raised Rs. $1$ crore in its first and last year of existence. The amount each firm raised every year increased until it reached a maximum, and then decreased until the firm closed down. No firm raised the same amount of money in two consecutive years. Each annual increase and decrease was either by Rs. $1$ crore or by Rs. $2$ crores.
The table below provides partial information about the five firms.
\begin{array}{|l|c|c|c||}
\hline \text{Firm} & \text{First year of existence} & \text{Last year of existence} & \text{Total amount raised (Rs. crores)}\\
\hline \text{Alfloo} & 2009 & 2016 & 21 \\
\hline \text{Bzygoo} & 2012 & 2015 & \\
\hline \text{Czechy} & 2013 & & 9 \\
\hline \text{Drjbna} & 2011 & 2015 & 10 \\
\hline \text{Elavalaki} & 2010 & & 13\\
\hline
\end{array}
What best can be concluded about the total amount of money raised in $2015$?
- It is either Rs. $7$ crores or Rs. $8$ crores or Rs. $9$ crores.
- It is either Rs. $7$ crores or Rs. $8$ crores.
- It is either Rs. $8$ crores or Rs. $9$ crores.
- It is exactly Rs. $8$ crores.