Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Chemistry in Everyday Life
In the treatment of cancer, which of the following is used in external radiation therapy?
1
Cobalt 60
2
Iodine 131
3
Plutonium 238
4
More than one of the above
5
None of the above