51. under the ls coupling scheme, the possible spectral terms 2s+1l, for the electronic configuration 2s'3s' are (a) sp p (b) 's.'s, s (c) 's. 's,, s. 's (d) °s

51. Under the LS coupling scheme, the possible spectral terms 2s+1L, for the electronic configuration 2s'3s' are (A) SP P (B) 'S.'s, S (C) 's. 's,, S. 'S (D) °S.°S,