Which of the following species is isotonic with \[_{37}R{{b}^{86}}\] [

1.	Which of the following species is isotonic with \[_{37}R{{b}^{86}}\] [BHU 2001]
A.	\[_{36}K{{r}^{84}}\]
B.	\[_{37}R{{b}^{85}}\]
C.	\[_{38}S{{r}^{87}}\]
D.	\[_{39}{{Y}^{89}}\]
Answer» D. \[_{39}{{Y}^{89}}\]

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Which of the following species is isotonic with \[_{37}R{{b}^{86}}\] [BHU 2001]

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