From the graph of binding energy (B.E.)vs mass number plotted as shown ,identify the correct option (s)

From the graph of binding energy (B.E.)vs mass number plotted as shown

1.	From the graph of binding energy (B.E.)vs mass number plotted as shown ,identify the correct option (s)
Answer» Order of stability of nucleus is `D lt A lt C lt B`. If 'D' undergoes breakage to GIVE 'C' then energy must be supplied. If 'A' and 'B' combine to form 'D' then energy must be supplied. If 'C' undergo breakage into two fragments of equal mass number then energy will be released. Solution :[(A)`{:(,"For A","B","C","D"),("BE"//"Nucleon"=,(60)/(10)=6,(120)/(15)=8,(126)/(18)=7,(140)/(25)=5.6):}` So order of stability `B gt C gt A gt D` [`:.` As BE/Nucleon increases] Stability also increases. For BCD If `(BE)_("produced" )gt(BE)_("reactant")`then reaction will be spontaneous and energy will be released `{:(,"D"^(25),rarr,"C"^(18)""+X^(7),,),("BE",140,,ubrace(126""42),,),("BE","140MeV",," 168Me"V,,),(,,,,,):}` So energy will be released `{:(,"D"^(25),rarr,"C"^(18)""+X^(7),,),("BE",140,,ubrace(126""42),,),("BE","140MeV",," 168Me"V,,),(,,,,,):}` `"(BE)"_("Reactant")gt"(BE)"_("Product")` So to MAKE this reaction spontaneous energy has to be supplied. `{:(C^(18),rarr,Y^(9)""+""Y^(9),),(126,,underbrace(54""54),),(126,,""108,),(,,,):}` `"(BE)"_("Reactant")gt"(BE)"_("Product")` Energy will be released.]