A radioactive nucleus undergoes a series of decay according to the scheme \[A\xrightarrow{a}{{A}_{1}}\xrightarrow{\beta }{{A}_{2}}\xrightarrow{\alpha }{{A}_{3}}\xrightarrow{\gamma }{{A}_{4}}\] If the mass number and atomic number of 'A' are 180 and 72 respectively, then what are these numbers for \[{{A}_{4}}\]

• A. 172 and 69
• B. 174 and 70
• C. 176 and 69
• D. 176 and 70