Lemon‌juice:sugar‌syrup in the mixture is 1:1, i.e. 50% Lemon juice and 50% sugar syrup. In sugar syrup, 100% is sugar syrup. These two are mixed in the ratio 1:3. Lemon juice =
1(50%)
1+3
Sugar syrup =
1(50%)+3(100%)
1+3
=‌
350
4
Required ratio =50:350=1:7 The answer is option D.