The value of \[\sin \theta +\cos \theta \] will be greatest when [MNR 1977, 1983; RPET 1995]

• A. \[\theta ={{30}^{o}}\]
• B. \[\theta ={{45}^{o}}\]
• C. \[\theta ={{60}^{o}}\]
• D. \[\theta ={{90}^{o}}\]