Image 1 seems that of Terminalia mantaly of Combretaceae family. It is drought tolerant and planted as avenue tree in India. It is deciduous tree species native to Madagascar.
Image 1 & 2 is one and the same plant Sir.. In the first pic it was pruned and second growing on its own without any restriction. the pod is papery. Terminalia fruit is quite different from the plant showing here.. so it may not be Terminalia mantaley..
Yes Dodonaea triquetra J.C. Wendl. (Sapindaceae) is correct. It is an shrub native to Australia. It is planted as ornamental plants in gardens and pots.
Figure 1 & 2. Why are all going to Dodonaea triquetra, an Australian species ? Why it cant be Dodonaea viscosa which is a native species , in many parts of India.
Picture 3 is Carrisa spinarum of Apocynaceae
Picture 4 is surely Balanophoraceae, but not familiar to me
For 1 &2: Please look at Dodonaea angustifolia L.f. Family of Sapindaceae.
Geographical distribution and habit: Resinous/sticky when it is young; shrub or small tree that occurs naturally from southern Africa to Arabia, as well as in Australia and New Zealand. The seed capsules are three-winged and are dispersed by wind.
Common names:Giant bush hop, sand olive.
3&4: I agree with the answers given by Rajeev Kumar Singh.
In your supplied photographs there are 3 taxa - the first one is the photo graphs of - Dodonaea viscosa of the family Sapindaceae, the second one is the Carissa spinarum of the family Apocynaceae and the 4th photograph is the photo of Cistanche species of the family Orobancheceae, about species I am not sure need more clear photographs and it is probably not the Cistanche tubulosa and sure it is not Balanophora.