Q8.
The nodulation (nod) genes are classified as common nod genes or host specific nod genes. Some statements related to such classification are given below:
1. nodA is a common nod gene and nodC is a host specific gene.
2. nodB is a common nod gene and nodP is a host specific gene.
3. nodQ is a common nod gene and nodA is a host specific gene.
4. nodH is a common nod gene and nodQ is a host specific gene.
Choose the correct answer from the above statements:
A. 1. and 2.
B. 3 and 4
C. only 2.
D. only 1.