The team played 20 matches, won in 17 of them and lost in 3.

Let the total number of matches be 'm'

So, $\frac{2}{3}$ * m = 20 $\Rightarrow$ **m = 30**

Now, the team is yet to play 10 matches and has to win 3/4th of total matches

i.e. $\frac{3}{4}$ * 30 = 22.5 $\approx$ 23 out of 30 matches. $\therefore$ Total matches lost = 7

So, maximum matches the team can lose to win 3/4th of total matches = 7 - 3 = **4**

**(A) is correct.**